Ultrasonic cutting is completely different from conventional cutting. Ultrasonic cutters utilize ultrasonic energy to melt the material to be cut by localized heating of the material to be cut. The characteristics of the ultrasonic cutting blade do not require sharp edges, do not require a lot of pressure, and do not cause the cutting material to chip or crack. The cutting blades are subjected to ultrasonic vibrations and have exceptionally low frictional resistance, and the cut material does not tend to adhere to the blades. It is particularly effective on frozen, sticky and elastic materials, food, rubber or inconvenient objects. The cutting part has a fusion while cutting. The cutting part is completely sealed to prevent loose tissue (e.g. textile material fretting). The use of ultrasonic cutting knives can also be extended, e.g. for gouging, shoveling, scraping paint, engraving, longitudinal cuts, etc.